75d3db4911
this server, tests, vm support, library stubs and other contributions are the work of Guanqun Lu, a 2009 GSOC student.
103 lines
2 KiB
C
103 lines
2 KiB
C
#include "inc.h"
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PUBLIC int identifier = 0x1234;
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PUBLIC endpoint_t who_e;
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PUBLIC int call_type;
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PUBLIC endpoint_t SELF_E;
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struct {
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int type;
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int (*func)(message *);
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int reply; /* whether the reply action is passed through */
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} ipc_calls[] = {
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{ IPC_SHMGET, do_shmget, 0 },
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{ IPC_SHMAT, do_shmat, 0 },
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{ IPC_SHMDT, do_shmdt, 0 },
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{ IPC_SHMCTL, do_shmctl, 0 },
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{ IPC_SEMGET, do_semget, 0 },
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{ IPC_SEMCTL, do_semctl, 0 },
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{ IPC_SEMOP, do_semop, 1 },
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};
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#define SIZE(a) (sizeof(a)/sizeof(a[0]))
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int verbose = 0;
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PUBLIC int main(int argc, char *argv[])
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{
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message m;
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SELF_E = getprocnr();
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if(verbose)
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printf("IPC: self: %d\n", SELF_E);
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while (TRUE) {
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int r;
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int i;
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if ((r = receive(ANY, &m)) != OK)
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printf("IPC receive error %d.\n", r);
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who_e = m.m_source;
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call_type = m.m_type;
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if(verbose)
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printf("IPC: get %d from %d\n", call_type, who_e);
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if (call_type & NOTIFY_MESSAGE) {
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switch (who_e) {
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case PM_PROC_NR:
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/* PM sends a notify() on shutdown,
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* checkout if there are still IPC keys,
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* give warning messages.
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*/
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if (!is_sem_nil() || !is_shm_nil())
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printf("IPC: exit with un-clean states.\n");
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break;
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case VM_PROC_NR:
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/* currently, only semaphore needs such information. */
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sem_process_vm_notify();
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break;
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default:
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printf("IPC: ignoring notify() from %d\n",
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who_e);
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break;
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}
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continue;
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}
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/* dispatch messages */
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for (i = 0; i < SIZE(ipc_calls); i++) {
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if (ipc_calls[i].type == call_type) {
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int result;
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result = ipc_calls[i].func(&m);
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if (ipc_calls[i].reply)
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break;
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m.m_type = result;
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if(verbose && result != OK)
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printf("IPC: error for %d: %d\n",
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call_type, result);
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if ((r = sendnb(who_e, &m)) != OK)
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printf("IPC send error %d.\n", r);
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break;
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}
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}
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if (i == SIZE(ipc_calls)) {
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/* warn and then ignore */
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printf("IPC unknown call type: %d from %d.\n",
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call_type, who_e);
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}
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update_refcount_and_destroy();
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}
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/* no way to get here */
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return -1;
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}
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